We Have Cryogenic Valves! Don Wolf & Associates provides high performance cryogenic valves that operate at extremely low temperatures typically found when handling LN2 (liquid nitrogen) or LCO2 (liquid carbon dioxide) and other cryogenic media. These two-way, normally closed, rugged valves offer 1/4″ NPT ports and 1/4″ orifices. These valves function at extreme temperatures down to -320°F and provide millions of cycles of life expectancy… all designed to operate within your exacting requirements. These same valves are also well suited for high temperature, steam …